My son-in-law was fine. He takes Metformin for diabetes. Recently he got a rash while working in his yard and was given Prednisone, which he completed. About 1 week later, he developed extreme weakness, dizziness, inability to walk without assistance, and this deteriorated quickly to his now being unable to walk, feed himself, and he shakes uncontrollably. Even his feet muscles are going into spasms. He has received an MRI, a CAT scan, testing of spinal fluid, and probably the usual test. So far the neurologists are puzzled and can t determine what his health condition is. Any help would be appreciated.